2. Becky stood behind the partition that separated the audience from the people backstage and waited for her cue to enter.
The answer is not Irony, as it isn't ironic
The answer is not Symbolism, as it is literal
The answer is either Personification or Motif, if I have to choose, I'll take Motif.
Examples of irony
An old man turned ninety-eight
He won the lottery, and died the next day
It's a black fly in your Chardonnay
It's a death row pardon two minutes too late
It's like rain on your wedding day
It's a free ride when you've already paid
It's the good advice that you just didn't take